Reference Terms
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Red supergiant star
Red supergiants are supergiant stars of spectral type K-M and a luminosity class of I.
Note: The above text is excerpted from the Wikipedia article "Red supergiant star", which has been released under the GNU Free Documentation License.
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Space & Time News
February 19, 2025
'Out of Science Fiction': First 3D Observations of an Exoplanet's Atmosphere Reveal a Unique Climate
Feb. 18, 2025 — Astronomers have peered through the atmosphere of a planet beyond the Solar System, mapping its 3D structure for the first time. By combining all four telescope units of the European Southern ...
Feb. 13, 2025 — What if time is not as fixed as we thought? Imagine that instead of flowing in one direction -- from past to future -- time could flow forward or backward due to processes taking place at the quantum ...
Feb. 12, 2025 — Scientists have just detected a neutrino that is thirty times more energetic than any previously detected anywhere in the world. This exceptional discovery opens up new perspectives for understanding extreme energy phenomena in the Universe and the ...
Feb. 10, 2025 — Euclid, the European Space Agency's dark Universe detective, has made an astonishing discovery -- right in our cosmic ...
Latest Headlines
updated 12:56 pm ET
Feb. 19, 2025 — Within the Dark Energy Spectroscopic Instrument's early data, scientists have uncovered the largest samples ever of intermediate-mass black holes and ...
Feb. 18, 2025 — Astrophysicists have observed our central supermassive black hole. They found the accretion disk is constantly emitting flares without periods of ...
Feb. 18, 2025 — Lobster-eye satellite Einstein Probe captured the X-ray flash from a very elusive celestial pair. The discovery opens a new way to explore how massive stars interact and evolve, confirming the unique ...
Feb. 14, 2025 — Researchers demonstrated the first fully 3D-printed, droplet-emitting electrospray engine. The low-cost device can be fabricated more quickly than traditional thrusters, potentially from on board a ...
Feb. 14, 2025 — Asteroids that orbit close to the Earth inevitably cause us some anxiety due to the even remote possibility of a collision. But their proximity also ...
Feb. 14, 2025 — As more satellites, telescopes, and other spacecraft are built to be repairable, it will take reliable trajectories for service spacecraft to reach ...
Feb. 13, 2025 — Traditional black holes, as predicted by Albert Einstein's theory of General Relativity, contain what are known as singularities, i.e. points where the laws of physics break down. Identifying how ...
Feb. 13, 2025 — Astronomers used a 3D global computer model to compare the climates of exoplanets in different stellar and orbital configurations. They found that a planet orbiting a white dwarf star would offer a ...
Feb. 14, 2025 — Humanity may not be extraordinary but rather the natural evolutionary outcome for our planet and likely others, according to a new model for how ...
Feb. 14, 2025 — A unique dataset of Type Ia Supernovae being released today could change how cosmologists measure the expansion history of the ...